Skip to main content
LakeQuality

Green Belt Lake holds Grade C (Fair). Of the 5 lakes within 30 miles of it that carry a grade, none scores higher on nutrients and algae, so Green Belt Lake is the cleanest graded water in that radius. Lakes nearby without enough recent sampling to earn a letter are not part of that comparison.

Reviewed by LakeQuality Editorial Team · Updated

The graded lakes it was measured against

LakeCountyGradeDistanceClarity
Green Belt LakeBlack Hawk CountyCThis lake2.4 ft
South Prairie LakeBlack Hawk CountyF3.6 mi1.6 ft
Mitchell LakeBlack Hawk CountyC3.8 mi2.3 ft
Alice Wyth LakeBlack Hawk CountyF3.9 mi1.6 ft
Meyers LakeBlack Hawk CountyF5.2 mi1.1 ft
Casey LakeTama CountyF15.3 mi1.2 ft

What the comparison covers

A grade on LakeQuality comes from EPA Water Quality Portal samples: phosphorus, nitrogen, chlorophyll-a and turbidity, measured against EPA National Lakes Assessment ecoregion classes. Secchi clarity is shown and is not scored. This page compares Green Belt Lake only with neighbouring lakes in Iowathat carry a letter of their own, within 30 miles. A nearby lake with too little recent sampling has no letter to compare, so it is absent from the table rather than ranked below. Where a driving distance is not published for a lake, the table says so instead of estimating one.